LOS ANGELES Japanese stocks retreated Tuesday in choppy action, with utilities weaker and tech shares mixed, as the Nikkei Stock Average slipped 0.2% to 9,515.43 and the Topix also fell 0.2%. Power companies saw their shares extend recent weakness, with the drops coinciding with a government decision to permanently close a nuclear power plant in Fukui Prefecture due to the presence of an active seismic fault. In the often volatile sector, Tokyo Electric Power Co. and and Hokkaido Electric Power Co. dropped 3.6% each, while Chubu Electric Power Co. tumbled 5.8% and Kansai Electric Power Co. tanked by 7.1%. Renesas Electronics Corp. was the stand-out among tech names, surging 9.4% after the struggling chip maker confirmed a government-backed fund would invest up to 200 billion yen ($ 2.43 billion) in fresh capital. Its major shareholders, however, would see their holdings sharply diluted, the Nikkei business daily reported Tuesday. Among those shareholders, Hitachi Ltd. lost 0.4%, NEC Corp. fell 1.3%, though Mitsubishi Electric Corp. rose 0.3%. Among other blue chips, Nintendo Co. added to its Monday losses with a 4.4%, and Mitsubishi Motors Corp. fell 1.3%, while on the upside, Sharp Corp. rallied 3.9% and Kobe Steel Ltd. gained 1.3% after the company said Monday it would cut managers’ pay by an average of 5%.